NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
8X8, INC. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2023-03-08 534-212 8XXX9XXX which blocks → HD CARRIER LLC 321J EAU CLAIRE WI
2023-03-08 574-397 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J SOUTH BEND IN
2023-03-08 636-367 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 TROY MO
2023-03-08 681-460 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 FAIRMONT WV
2023-03-08 779-366 0XXX1XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → HD CARRIER LLC 321J ROCKFORD IL
2023-03-08 786-896 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2023-03-08 786-921 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HOMESTEAD FL
2023-03-08 786-927 0–9 XXXall 10 · 4 holders which blocks → LEAP TELECOM, LLC 616J MIAMI FL
2023-03-08 863-341 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 LAKELAND FL
2023-03-08 930-275 8XXX9XXX which blocks → HD CARRIER LLC 321J BLOOMINGTN IN
2023-03-08 930-276 8XXX9XXX which blocks → HD CARRIER LLC 321J TERREHAUTE IN
2023-03-07 218-617 1XXX which blocks → COMCAST IP PHONE, LLC 318J DULUTH MN
2023-03-07 234-367 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J YOUNGSTOWN OH
2023-03-07 234-368 0–9 XXXall 10 · 2 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J AKRON OH
2023-03-07 234-370 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → HD CARRIER LLC 321J YOUNGSTOWN OH
2023-03-07 320-471 1XXX8XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J ST CLOUD MN
2023-03-07 326-212 0–9 XXXall 10 · 3 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J DAYTON OH
2023-03-07 380-260 0–9 XXXall 10 · 4 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J COLUMBUS OH
2023-03-07 515-304 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J DES MOINES IA
2023-03-07 531-330 0XXX1XXX3XXX5XXX · 4 holders which blocks → COMMIO, LLC 939H WAYNE NE
2023-03-07 563-205 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J DAVENPORT IA
2023-03-07 572-213 0XXX1XXX2XXX3XXX4XXX which blocks → ONVOY, LLC - OK 409F OKLA CITY OK
2023-03-07 586-340 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CENTERLINE MI
2023-03-07 681-454 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 SUTTON WV
2023-03-07 712-418 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J SIOUX CITY IA
2023-03-07 719-741 0–9 XXXall 10 · 4 holders which blocks → HADLO TECHNOLOGIES, LLC 436J COLORDOSPG CO
2023-03-07 854-240 0–9 XXXall 10 · 5 holders which blocks → PALMETTO TELEPHONE COMMUNICATIONS, LLC - SC 154C BEAUFORT SC
2023-03-07 920-813 1XXX which blocks → TWC IP ENABLED SERVICES, LLC 793K GILLETT WI
2023-03-07 989-989 8XXX9XXX · 2 holders which blocks → COMMIO, LLC 939H CARO MI
2023-03-06 249-717 not yet reported which blocks → TELUS Integrated Communications 2782 Hearst —
2023-03-06 249-718 not yet reported which blocks → TELUS Integrated Communications 2782 Haileybury —
2023-03-06 463-284 0XXX9XXX · 2 holders which blocks → AT&T - LOCAL 7421 CHARLOTSVL IN
2023-03-06 480-852 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2023-03-06 548-514 not yet reported which blocks → Fibernetics Corporation 464D La Salle —
2023-03-06 701-513 0XXX1XXX8XXX9XXX · 3 holders which blocks → PEERING HUB, INC. 571J DICKINSON ND
2023-03-06 720-973 0–9 XXXall 10 · 3 holders which blocks → HADLO TECHNOLOGIES, LLC 436J DENVER CO
2023-03-06 771-223 0–9 XXXall 10 · 3 holders which blocks → LEAP TELECOM, LLC 616J WSHNGTNZN1 DC
2023-03-06 912-990 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H WAYCROSS GA
2023-03-03 229-580 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BAINBRIDGE GA
2023-03-03 272-314 0XXX1XXX2XXX3XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J WAPWALLOPN PA
2023-03-03 307-415 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → NUSO, LLC 732J CHEYENNE WY
2023-03-03 313-370 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN4 MI
2023-03-03 325-331 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → NUSO, LLC 732J BROWNWOOD TX
2023-03-03 334-879 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DOTHAN AL
2023-03-03 425-536 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F BELLEVUE WA
2023-03-03 445-280 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN39 PA
2023-03-03 447-251 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 732J DECATUR IL
2023-03-03 517-314 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 732J JACKSON MI
2023-03-03 615-993 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 SPRINGFLD TN
2023-03-03 775-208 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 732J PAHRUMP NV

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.